阅读说明：本技术 一种高性能内置带振荡器驱动芯片的蜂鸣器 (High-performance built-in buzzer with oscillator driving chip ) 是由 张怀东 于 2020-03-10 设计创作，主要内容包括：本发明涉及一种高性能内置带振荡器驱动芯片的蜂鸣器,包括带振荡器的集成电路驱动芯片、电容、单组电磁线圈、线路板、支架、磁环、振动片、正极针脚、负极针脚、壳体、密封胶,其中所述带振荡器的集成电路驱动芯片、电容、正极针脚、负极针脚焊接在线路板上,带振荡器的集成电路驱动芯片电源连接正极针脚,带振荡器的集成电路驱动芯片地线连接负极针脚,单组电磁线圈一端连接正极针脚,单组电磁线圈另一端连接带振荡器的集成电路驱动芯片的输出端,电容一端连接正极针脚,电容另一端连接负极针脚。本产品的技术方案具有启动电压低、抗干扰能力强、可靠性高和成本低的优点。(The invention relates to a high-performance built-in buzzer with an oscillator driving chip, which comprises an integrated circuit driving chip with an oscillator, a capacitor, a single group of electromagnetic coils, a circuit board, a support, a magnetic ring, a vibrating piece, an anode pin, a cathode pin, a shell and sealant, wherein the integrated circuit driving chip with the oscillator, the capacitor, the anode pin and the cathode pin are welded on the circuit board, a power supply of the integrated circuit driving chip with the oscillator is connected with the anode pin, a ground wire of the integrated circuit driving chip with the oscillator is connected with the cathode pin, one end of the single group of electromagnetic coils is connected with the anode pin, the other end of the single group of electromagnetic coils is connected with an output end of the integrated circuit driving chip with the oscillator, one end of the capacitor is connected with the anode pin. The technical scheme of the product has the advantages of low starting voltage, strong anti-interference capability, high reliability and low cost.)

1. A high-performance built-in buzzer with an oscillator driving chip comprises an integrated circuit driving chip with an oscillator, a capacitor, a single group of electromagnetic coils, a circuit board, a support, a magnetic ring, a vibrating piece, an anode pin, a cathode pin, a shell and sealant, wherein the integrated circuit driving chip with the oscillator, the capacitor, the anode pin and the cathode pin are welded on the circuit board, a power supply end of the integrated circuit driving chip with the oscillator is connected with the anode pin, a ground wire end of the integrated circuit driving chip with the oscillator is connected with the cathode pin, one end of the single group of electromagnetic coils is connected with the anode pin, the other end of the single group of electromagnetic coils is connected with an output end of the integrated circuit driving chip with the oscillator, one end of the capacitor is connected with the anode pin, and the.

2. The high-performance built-in buzzer with an oscillator driving chip as claimed in claim 1, wherein said integrated circuit driving chip with oscillator has three pins, which are power terminal, ground terminal and output terminal, and said integrated circuit driving chip with oscillator includes an oscillating circuit, a rectifying circuit and a driving tube.

3. The high-performance built-in buzzer with an oscillator driving chip as claimed in claim 1, wherein said integrated circuit driving chip with oscillator is an integrated circuit using silicon material.

Technical Field

The invention relates to an electromagnetic buzzer, in particular to a high-performance active buzzer with a built-in driving chip of an oscillator.

Background

Most of the existing electromagnetic buzzers still use triodes to form a double-set electromagnetic coil structure of a driving circuit, and have the defects of high cost, low reliability and the like; there is also a single-group electromagnetic coil structure using a chip as a driving circuit, and this scheme also has the disadvantages of high starting voltage, low reliability, etc.

Chinese patent: 2016101552253, the start voltage is relatively high because the integrated circuit chip contains a constant voltage power supply, and after the driving tube is cut off, the electromagnetic coil charges the chip through the freewheeling diode, so it is difficult to make a relatively large capacitor in the integrated circuit chip, especially the integrated circuit chip of silicon material, which results in a high risk of damaging the driving chip and low reliability of the buzzer.

Disclosure of Invention

The invention aims to solve the defects of high starting voltage and low reliability when an integrated circuit chip is used as an active buzzer driving circuit.

In order to solve the problems, the invention provides a high-performance buzzer with a built-in driving chip with an oscillator, which comprises an integrated circuit driving chip with an oscillator, a capacitor, a single group of electromagnetic coils, a circuit board, a bracket, a magnetic ring, a vibrating piece, an anode pin, a cathode pin, a shell and sealant, wherein the integrated circuit driving chip with the oscillator, the capacitor, the anode pin and the cathode pin are welded on the circuit board, a power supply end of the integrated circuit driving chip with the oscillator is connected with the anode pin, a ground wire end of the integrated circuit driving chip with the oscillator is connected with the cathode pin, one end of the single group of electromagnetic coils is connected with the anode pin, the other end of the single group of electromagnetic coils is connected with an output end of the integrated circuit driving chip with the oscillator, one end of the capacitor is connected with the anode pin, the other end of the capacitor is connected with, the integrated circuit driving chip with the oscillator comprises an oscillating circuit, a rectifying circuit and a driving tube.

In order to save cost, the integrated circuit driving chip with the oscillator is an integrated circuit using silicon materials.

When the pin of the positive electrode of the buzzer is connected with a direct current positive potential and the pin of the negative electrode of the buzzer is connected with a direct current negative potential, the integrated circuit with the oscillator drives the oscillator in the chip to work, and outputs a certain frequency signal to drive the single group of electromagnetic coils through the output end OUT, so that the buzzer makes a sound, and the frequency of the sound is determined by the frequency of the integrated circuit with the oscillator driving the oscillator in the chip.

According to the invention, because the power supply of the integrated circuit driving chip with the oscillator is directly connected with the positive pin instead of being indirectly connected with the positive pin through the rectifying circuit, the starting voltage is lower, and if the integrated circuit driving chip with the oscillator does not contain a voltage reference source, the starting voltage is lower.

According to the invention, as the power supply of the integrated circuit driving chip with the oscillator is directly connected with the positive pin which is connected with the capacitor, the integrated circuit driving chip with the oscillator is not easy to be damaged and does not cause larger impact on a system.

In conclusion, the invention has the following beneficial effects: a high-performance built-in buzzer with an oscillator driving chip has the advantages of low starting voltage, high reliability and low cost.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a circuit schematic of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the invention provides a high-performance buzzer with a built-in driving chip with an oscillator, which comprises an integrated circuit driving chip 10 with an oscillator, a capacitor 11, a single group of electromagnetic coils 5, a circuit board 6, a bracket 3, a magnetic ring 4, a vibrating reed 2, an anode pin 8, a cathode pin 9, a shell 1 and a sealant 7.

In actual installation, as shown in fig. 1, the integrated circuit driving chip with oscillator 10, the capacitor 11, the positive pin 8 and the negative pin 9 are soldered on the circuit board 6.

Referring to fig. 2 and fig. 1, the line connection relationship is: the power supply end VDD of an integrated circuit driving chip 10 with an oscillator is connected with a positive pin 8, the ground end GND of the integrated circuit driving chip 10 with the oscillator is connected with a negative pin 9, one end of a single group of electromagnetic coils 5 is connected with the positive pin 8, the other end of the single group of electromagnetic coils 5 is connected with an output end OUT of the integrated circuit driving chip 10 with the oscillator, one end of a capacitor 11 is connected with the positive pin 8, and the other end of the capacitor 11 is connected with the negative pin 9. The integrated circuit driving chip 10 with the oscillator has three pins, which are a power supply terminal VDD, a ground terminal GND and an output terminal OUT.

As shown in fig. 1, the integrated circuit driving chip with oscillator 10 includes an oscillating circuit, a rectifying circuit, and a driving tube.

Referring to fig. 2, with reference to fig. 1, when the positive pin 8 of the buzzer is connected to a positive dc potential, and the negative pin 9 of the buzzer is connected to a negative dc potential, the integrated circuit with oscillator drives the internal oscillator of the chip 10 to operate, and outputs a signal with a certain frequency to drive the single set of electromagnetic coils 5 through the output terminal OUT, and the vibrating reed 2 makes a sound by the varying magnetic field, and the frequency of the sound is determined by the frequency of the internal oscillator of the integrated circuit with oscillator driving chip 10. Since the power supply of the integrated circuit driver chip with oscillator 10 is directly connected to the positive pin 8, rather than indirectly connected to the positive pin 8 through a rectifying circuit, the start-up voltage is relatively low, and if the integrated circuit driver chip with oscillator 10 does not include a voltage reference source, the start-up voltage is lower. Because the power supply of the integrated circuit driving chip with oscillator 10 is directly connected with the positive pin 8, and the positive pin 8 is connected with the capacitor 11, the integrated circuit driving chip with oscillator 10 is not easy to be damaged, and does not cause larger impact on the system.

In conclusion, the invention has the following beneficial effects: a high-performance built-in buzzer with an oscillator driving chip has the advantages of low starting voltage, high reliability and low cost.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.